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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Feb-02-2013, 08:38:14 PM   #1
Enriquejuliano
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Default Need Help with Square setup

I have bbs rg's that are 18x8.5'' with a offset of 40, that being said, with that high offset could i mount 255-35's for all 4? or would the front rub? my first choice was 245's but i seen some pics of some 255's on some e46's and it looks like that aggressive stance i've been looking for

Last edited by Enriquejuliano; Sat, Feb-02-2013 at 08:59:50 PM.
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Old Sat, Feb-02-2013, 08:46:13 PM   #2
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Default Re: Need Help with Square setup

we need to know the widths...
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Old Fri, Feb-08-2013, 10:03:12 AM   #3
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Default Re: Need Help with Square setup

anyone?
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Old Fri, Feb-08-2013, 10:11:13 AM   #4
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Default Re: Need Help with Square setup

If you want the "flush look" and use stock camber (-1 front / -1.3 rear), here is what you need :
Spacers front / rear : 0mm / 35mm rear

If you want the stock look :
Spacers front / rear : 0mm / 25mm

As for the tire, 255 on a 8.5“ rim would be the biggest tire you want to run.

To me, 25mm spacer is just too much, and that means the rim is not made for the car. Up to you to decide.

FIY, fronts are 13mm more agressive than OEM fronts (which means it would be as if you were running OEM fronts with 13 mm spacers, which is quite common)
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Old Fri, Feb-08-2013, 10:12:42 AM   #5
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Default Re: Need Help with Square setup

PS : with stock camber & ride height, the fronts would not rub I believe, but it depends on the tire. -1.5 will make it safe.
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Old Fri, Feb-08-2013, 10:22:11 AM   #6
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Default Re: Need Help with Square setup

Thanks I'll go with 255's then would /30 sidewall fit for the rears? would it be a 255/30?

Last edited by Enriquejuliano; Fri, Feb-08-2013 at 10:25:25 AM.
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Old Fri, Feb-08-2013, 11:25:49 AM   #7
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Default Re: Need Help with Square setup

You need the same front / rear sidewall. Otherwise you will trigger DSC.
If you change the original sidewall, you will change the speedo : smaller sidewall will have it read faster than you are actually going, bigger sidewall will have it to read slower than you are actually going. Factory error is ~+5%.

Original sidewall is 40, and gives a circumference of 2077mm (that is the calculation, which should be about right).
30 sidewall will be 1917mm, which is -8% compared to original, so your speedo will be ~13% wrong.

You need same sidewall F+R! Go with 255/40/18
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Old Fri, Feb-08-2013, 09:08:09 PM   #8
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Default Re: Need Help with Square setup

thanks for the info. i think ill stick with /35 sidewall though. haha. i like my tires beefy.
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Discussing Need Help with Square setup in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)